XU Hong-min, YAO Xue-feng, FENG Xi-qiao. DYNAMIC STRESS INTENSITY FACTOR K AND DYNAMIC CRACK PROPAGATION CHARACTERISTICS OF ORTHOTROPIC MATERIAL[J]. Engineering Mechanics, 2006, 23(10): 68-72,8.
Citation: XU Hong-min, YAO Xue-feng, FENG Xi-qiao. DYNAMIC STRESS INTENSITY FACTOR K AND DYNAMIC CRACK PROPAGATION CHARACTERISTICS OF ORTHOTROPIC MATERIAL[J]. Engineering Mechanics, 2006, 23(10): 68-72,8.

DYNAMIC STRESS INTENSITY FACTOR K AND DYNAMIC CRACK PROPAGATION CHARACTERISTICS OF ORTHOTROPIC MATERIAL

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  • Received Date: May 15, 2005
  • Revised Date: December 29, 2005
  • The dynamic propagation problem of semi-infinite mode Ⅲ crack in an orthotropic infinite body is investigated. The stresses and displacements near the crack tip are expressed as analytical complex functions, which can be represented in power series. The constant coefficients of the series are determined with boundary conditions. Simple approximate expressions for the stresses and displacements near the crack tip are developed. The expressions can be degenerated for static problems in isotropic materials. Finally, the crack propagation characteristics are represented with the mechanical properties of the orthotropic material and crack speeds. The faster the crack velocity, the greater the maximum values of the stresses and displacements near the crack tip.
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